<nav>
  <div class="left_nav">
    <a href="index.html" id="home" class="nav-item">Home</a>
    <a href="{:url('index/index/future')}"  class="nav-item">Future</a>
    <a href="{:url('index/index/about_me')}"  class="nav-item">About me</a>
  </div>
  <div class="center_nav">
  </div>
  <div class="right_nav">
    {if condition="$logined === true"}
      <a href="{:url('admin/index/index')}"  class="nav-item enter_back" >Go {$username}</a>
      <a href="{:url('index/user/outLogin')}"  class="nav-item out_login" >OutLogin</a>
    {else /}
      <a href="{:url('index/user/login')}"  class="nav-item">Login</a>
      <a href="{:url('index/user/register')}"  class="nav-item">Register</a>
    {/if}
    
  </div>
</nav>